Knee protector



FIG. 1 is a front elevational view of a knee protector showing my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a rear elevational view; and

FIG. 5 is a top plan view, the bottom being identical. 

The ornamental design for a knee protector, substantially as shown and described. 